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Routines |
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Used by the routine at MoveObject.
Makes a signed number into a signed word.
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Put the number in the low byte. The high byte is zero, or 255 if the number is negative.
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| SignExtendAToHL | 53283 | LD L,A | Make the number the low byte. | |||||||||
| 53284 | XOR A | Start with a high byte of zero. | ||||||||||
| 53285 | BIT 7,L | Jump to SignExtendAToHL_Set if the number is not negative. | ||||||||||
| 53287 | JR Z,SignExtendAToHL_Set | |||||||||||
| 53289 | CPL | Make the high byte 255. | ||||||||||
| SignExtendAToHL_Set | 53290 | LD H,A | Set the high byte. | |||||||||
| 53291 | RET | Return. | ||||||||||
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View the equivalent code in;
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